Data/hora: 09/06/2024 10:49:26

Provedor de dados: | 64
País: | Brazil
Título: | Nitrogen loss by volatilization of nitrogen fertilizers applied to coffee orchard
Autores: | Dominghetti,Anderson William; Guelfi,Douglas Ramos; Guimarães,Rubens José; Caputo,André Luiz Carvalho; Spehar,Carlos Roberto; Faquin,Valdemar.
Data: | 2016-04-01
Ano: | 2016
Palavras-chave: | Coffee arabica; Slow and controlled release and stabilized fertilizers; Ammonium nitrate; Urea.
Resumo: | ABSTRACT Ammonia volatilization (N-NH3) is one of the main pathways of Nitrogen loss reducing nitrogen use efficiency in coffee orchard. This work aimed at quantifying ammonia volatilization (N-NH3) losses from N-sources to be used in coffee plantations fertilization in Brazil. The experiment was conducted in the field on a dystrophic red latosol (Ferralsol in FAO's classification) at the Coffee Research Sector, University of Lavras, MG, Brazil. The experimental design was of complete randomized blocks with three repetitions of the following treatments: conventional urea, ammonium nitrate and urea + 0.15% Cu and 0.4% B, urea + anionic polymers, urea + elementary sulfur (S0) + polymers, and urea + plastic resin. These N sources were split into three doses of 150 kg ha-1 and band applied. The N-NH3 losses by volatilization and variations of pH (H2O) were measured, before and after N application. The N-sources contributed to reduce the soil pH, measured after the third nitrogen fertilization. The N-NH3 losses by volatilization (average from three applications) was as follows: urea + anionic polymers (35.8%) &gt; conventional urea (31.2%) = urea + S0 + polymers (31.0%) &gt; urea + 0.15% Cu + 0.4 % B (25.6%) &gt; urea + plastic resin (8.6%) = ammonium nitrate (1.0%).
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000200173
Editor: | Editora da Universidade Federal de Lavras
Relação: | 10.1590/1413-70542016402029615
Formato: | text/html
Fonte: | Ciência e Agrotecnologia  v.40 n.2 2016
Fonte: | info:eu-repo/semantics/openAccess